Tiios



f UNITED STATES PATENT OFFICE.

TIIOS. GEO. HAROLD, OF BROOKLYN, NFV YORK, ASSIGNOR TO HIMSELF AND JOHN XV. KISSAM, OF SAME PLACE.

IMPROVEMENT iN LOCKS.

Specification forming part of Letters Patent No. 4 i [77, (lated January 5, 1864.

To all whom zt may concern:

Beit known that I, THOMAS GEORGE HAR- OLD, of Brooklyn, in the county of Kings and Statefjof New York, have invented, made, and applied to use a certaiinnew and useful In1- provement in Locks; and I'vdo hereby declare the following to be a full, clear, and exact description of the said invention, reference being had to the annexed drawings, making part of this specification, wherein- Figure l is an elevation of the lock. Fig. 2 is a' view with the cap removed. Fig. 3 represents the lock with the rotating block that acts on the bolt removed. Fig. 4 is a section of the lock. Fig. 5 represents the key. Fig. 6 is a section longitudinally, and Fig. 7 is a cross-section, of a vvariation in the turning block, whereby the lock can be adapted to diii'erent thicknesses of doors or other articles to which it is attached.

Similar marks of reference denote the same parts.

i The nature of my said invention consists in a turning block fitted with stop-pins and a projecting arm acting upon a sliding bolt, so that said bolt is kept in a projected position and cannot be pressed back in consequence ot the direct action of the turning block and stop-pins, Ithereby adaptingsaid lock to moneydrawers, closets, Sie., as distinguished from the spring-latches heretofore in use, which fasten every time the door or drawer is sluit,- and I introduce the turning block within a screw-tube by which the surfaces in contact of the turning and stationary block can be regulated s6 as to press together more or less closely, and byv'which screw-tube the turning block can be removed lto change the position of the divided stoppins without opening the other parts of the lock. 0

I make use o? inclines on the end of the stationary block to prevent a measure being taken of the length of the stop-pins when the lock is unlocked.

In the drawings, a is the lock-case of 'anyV suitable size and shape. b is the bolt, with the talon c receiving the arm d upon the turning block e. This turning block e is formed as a pipe surrounding the stationary block f,

and g 7L are the divided stop-pins, kept for- Ward by the springs The pins h are formed pins and springs work better when large, and

at the same time to retain as much metal as possible at the end of the pins h, in the turning-block e, to render drilling difficult and tedious and prevent the burglarious destruction of the lock.

The block e is retained by an annular flange,

l, on the screw -pipe k, that surrounds said block and enters an opening in the cap-plate l of the lock. By screwing in this pipe lc the block e can be brought into the necessary proximity to the blockfto prevent any endwise motion of said block e, but not to press them together sufficiently to cause them to bind, and this screw-pipe lc is held in place, l when adjusted, by a screw or pin, 2.

The front end ofthe turning block e projects suiciently to form a knob or turner, 3, the edge of which may be milled or roughened. I m is the key, having pin-bits that are of the proper length to press the divided stop-pins back the amount necessary to bring the dif visions ofsaid stop-pins at the division between the blocks f and e.

It will now be evident that the lock can be locked by turning the knob 3, and the stoppins will bya direct action hold the bolt in its projected position, and it cannot be pressed back the same as ordinary latch-bolts, and. does` not require dogs or .tumblers as heretofore employed with bolts that do not spring forward When the key is introduced, theblock e can beturned -and the bolt Withdrawn.

It' the end of the block f was flat, a measure could be taken when the lock was unlocked, to determine how far the pins h had to be pressed in, and thereby a pick or false key could be made. I prevent this by removing the surface of the block f at the side of the stop-pinV holes, as seen at 4 4, Fig. 3, toform inclines that will press the stop-pins It forward to place as the lock is locked, but which will prevent any impression being obtained of the key, as the stop-pins can be pressed back-beyond the proper point whenv the lock is open.

The variation in this lock (shown in Figs.

and 7) consists in a tube, u, screwed upon e outside of the block e, and turning with by which the end of said tube can be adsted to stand flush with the surface of a door drawer,A and the key itself is passed into a )tin a changeable block, o, that sets at the .d of the block e, and turns therewith, being eid by pins or dowels 5 and the screw-tube This block o is to be thicker or thinner, cording to the thickness of the door or awel. Y What I claim, and desire to secure by Letrs Patent, isv 1,. A' turning block provided with an arm king the notch or talon of a sliding bolt, as

ecified, in combinationwith the stationary Jckand divided stop-p,ins,whereby the bolt .l1 be projected by the arm and retained in at position by the stop-pins, as set forth.

2; rIhe knob or turner 3 at the end of the rningA block e, in combination with the di- 4. Inclines formed on the end of the stationy ary block f, 'in combination with the divided stop-pins, forthe purposes and as specified.

5. Divided stoppins formed withV shanks projecting into the holes that receive the keyvbits when such shanks are smaller than the pins themselves, for the purposes speciiied.

In witness whereof I have hereunto set my signature this 9th day of November, A. D. 1863.

' Trios. eno. HAROLD.

Witnesses: LEMUET. W. SERRELL, CHAs. H. SMITH. 

